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User name Mitra
Log entry time 08:03:16 on May 8,2011
Entry number 358575
keyword=Owl Shift Summary
SL: Mitra Shabestari
TO: Chao GU
3rd: Zinzhan Bai
Kinematics 6.5: P = 2.845 GeV/c, Theta = 28.0 degrees
00:00 --- Moved target to Optics
00:31 --- Moved target to He3
00:37 --- CODA problem. No start of the run for run# 2474. We had to restart CODA.
01:08 --- MCC called to let us know that they are having difficulties delivering 120muA current.
They think that problem comes from injector so we continue data taking with 110muA.
02:44 --- Beam has become stable after reducing current to 110muA.
02:49 --- The DAQ rates were very high about 7K and deadtime was also very large.
We stopped the run. Restarting CODA and deadtime GUI didn't help.
Called RC; we need to have DAQ expert to solve the problem.
5:00 --- Alexandre called. He thinks that it can be a module problem. I called MCC
and asked for escorted access to the hall. Alexandre is on his way.
05:30 --- Alexandre and Zhihong are done in the hall. It seems that the problem was a loose cable connection
05:39 --- We got beam back and started taking production data.
We continued taking production data on He3 till the end of the shift.
Run list for kinematics 5.6
Run# --- target, current, #of events
4273 --- Optics, 5muA, 35.5K
4274 --- He3, 120muA, CODA problem. Run didn't start.
2475 --- He3, 120-110muA, 967K
2476 --- He3, 110muA, 1.0M
2477 --- He3, 110muA, Rates were too high => stopped the run (JUNK RUN)
2478 --- He3, 110muA, Rates were too high => stopped the run (JUNK RUN)
2479 - 4294 --- Test and junk runs.
2495 --- He3, 110muA, 868K
2496 --- He3, 110muA, 867K
2497 --- He3, 110muA,... ongoing